Good-Cooking - Lemon-Lime Muffins

Ingredients

• 1 cup butter, softened or melted
• 1 1/2 cups granulated sugar
• 4 eggs
• 2 teaspoons lemon extract
• 8 ounces lime yogurt (or raspberry)
• 2 1/2 cups flour
• 1 1/2 teaspoons baking powder
• 1 teaspoon salt
• 4 1/2 ounces lime juice
• 2 teaspoons lemon or lime peel, grated
• Additional sugar and 2 ounces lime juice